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| Pete W.:
Hi there, Norman, I think someone has already suggested this (wasn't it Andrew?) but just filling with sand would probably be a good method of damping (vibration damping, that is!). Back in the 1060s, when I first got interested in Hi-Fi, some enthusiasts would build loudspeaker enclosures with double plywood walls and fill the intermediate space with DRY sand. This made the cabinet acoustically dead because any sound (=vibration) energy that tried to flex the cabinet walls would be robbed of its energy by the friction between the individual sand grains. It really does need to be dry sand - there were tales of blokes wives arriving home unexpectedly and finding baking dishes of sand 'cooking' in the oven! The sand would also need to be first washed to remove any salt - that would attract moisture from the atmosphere and cause corrosion. It would have the advantage that if it didn't work, it would be easy to remove to make room for something else. Of course, you'll have to block up all of the holes in your frame except for the very top one. Over time, the vibration from the machine would make the sand compact and settle so you'd probably need to top up the filling after a while. |
| NormanV:
Hi Pete, you're old "Back in the 1060s" Sand would be a good idea, certainly cheaper than lead. |
| Pete W.:
--- Quote from: NormanV on May 16, 2014, 05:39:56 PM ---Hi Pete, you're old "Back in the 1060s" SNIP --- End quote --- Now, now, Norman, you mustn't be pedantic! I was only one key out! :D :D :D :offtopic: Actually, I was born a couple of weeks before the Hindenberg disaster and a few weeks before King George VI coronation. That doesn't count as 'old', it counts as 'mature and wise'. Sort of more Stradivarius than Stratocaster! :lol: :lol: :lol: |
| awemawson:
Ah yes but old age is a hell of a price to pay for being mature and wise :lol: |
| NormanV:
We just have to go with what we have. |
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